National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.

AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.

Forecast Discussion: August 10-15 2018 – High pressure over the west will maintain very warm to hot conditions across the interior. Along the coast slightly cooler temperatures are expected by this weekend as high pressure weakens causing a persistent shallow marine layer and moderate onshore flow. The district AQI monitors are predicted to stay in the GOOD category for PM2.5 along the coast but warmer inland areas may see PM2.5 in the MODERATE range. Hollister and King City may see PM10 in the MODERATE range. Ozone is expected to be GOOD along the coast. Pinnacles may see Ozone levels in the MODERATE range this weekend.